Peripherals; Push Buttons And Leds; Efp01 Pmic - Silicon Laboratories SLWRB4179B Manual

5. Peripherals

The starter kit has a set of peripherals that showcase some of the features of the EFR32.
Be aware that most EFR32 I/O routed to peripherals are also routed to the breakout pads or the EXP header. This must be taken into
consideration when using these.

5.1 Push Buttons and LEDs

The kit has two user push buttons marked PB0 and PB1. They are connected directly to the EFR32 and are debounced by RC filters
with a time constant of 1 ms. The buttons are connected to pins PB00 and PB01.
The kit also features two yellow LEDs marked LED0 and LED1 that are controlled by GPIO pins on the EFR32. The LEDs are connec-
ted to pins PD02 and PD03 in an active-high configuration.

5.2 EFP01 PMIC

The EFP01 is an extremely flexible, highly efficient, multi-output power management IC with integrated Coulomb counter for lossless
charge measurements. The EFR32 on the kit is connected to an EFP0104 in the Wired Buck with LDO C configuration. For more infor-
mation on how the power is connected, see section
2
the EFP01 consists of an I C bus and an interrupt line as shown in the figure below.
Note: The energy mode state of the EFP01 can be changed either by I
not have dedicated hardware support for direct mode control, and it is therefore recommended to not use direct mode control on this kit.
For more information on this topic consult the EFP01 data sheet.
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UIF_LED0
PD02 (GPIO)
UIF_LED1
PD03 (GPIO)
UIF_PB0
PB00 (GPIO)
UIF_PB1
PB01 (GPIO)
EFR32
Figure 5.1. Buttons and LEDs
4.2 EFP01 PMIC Power
PA00 (GPIO)
PC00 (I2C1_SCL)
PC01 (I2C1_SDA)
EFR32
Figure 5.2. EFP01 Energy Friendly Power Management IC
UG422: EFR32xG21 2.4 GHz 10 dBm with EFP Wireless Starter Kit User's Guide
User Buttons
& LEDs
Topology. The digital connection between the EFR32 and
2
C commands or via direct mode control. The EFR32xG21 does
EFP0104
EFP_IRQ
Energy Friendly
EFP_SCL
Power Management
EFP_SDA
IC
Peripherals
Rev. 0.1 | 16